基于局部校准的大规模MIMO互易性校准

发布时间：2018-04-23 12:57

本文选题：大规模多输入多输出(MIMO) + 互易性校准　；参考：《清华大学学报(自然科学版)》2017年09期

【摘要】：在时分双工大规模多输入多输出(multiple-input multiple-output,MIMO)系统中,上下行通道的互易性校准是非常关键的。在相对校准方案中,系统仅需获得天线之间的信道响应,无需增加额外的硬件电路,其中最小二乘(least square,LS)校准表现出了较高的精度。然而,LS校准导致算法复杂度过高。该文提出了一种局部校准方案,利用若干组局部天线间的通道测量,使校准精确度得到保证,并且通过限制局部天线的规模降低校准复杂度。仿真结果表明:该方案可在大幅度降低计算复杂度的前提下保证校准精度损失很小。
[Abstract]:In time division duplex large scale multiple-input multiple-output multiple-input multiple-output MIMO systems, the reciprocal calibration of up-down channel is very important. In the relative calibration scheme, the system only needs to obtain the channel response between antennas, and no additional hardware circuits need to be added. However, LS calibration results in high complexity of the algorithm. In this paper, a local calibration scheme is proposed, in which the calibration accuracy is guaranteed by the channel measurement between several groups of local antennas, and the calibration complexity is reduced by limiting the size of the local antennas. The simulation results show that the proposed scheme can reduce the computational complexity greatly and ensure that the calibration accuracy loss is very small.
【作者单位】：清华大学电子工程系清华信息科学与技术国家实验室;
【基金】：国家“八六三”高技术项目(2015AA01A701) 清华大学自主科研项目(2016ZH02-3) 国家科技重大专项(2016ZX03001002-002)
【分类号】：TN919.3

【相似文献】